railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Angle Modulation Frequency Modulation
A 10 MHz carrier signal is frequency modulated by analog-modulating signal. The maximum frequency deviation is 75 kHz. If the frequency of the modulating signal is 300 kHz. then the modulation index and the approximate transmission bandwidth of the FM signal are respectively.
1
0.25, 750 kHz
2
0.25, 600 kHz
3
0.75, 750 kHz
4
0.75, 450 kHz